I loved La Nouba, and would happily go and se more Cirque du Soleil shows.

But I saw Blue Man group in Vegas and I thought it was vastly over-rated and about an hour too long. Some parts are undoubtedly very good (I loved the music on the plumbing pipes for example) but I found some parts just very poor entertainment. I don't pay all that money to drag huge rolls of tissue paper over my head.